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Marketshare.Investing
Sample data
S&P 500612.44+0.36%Nasdaq 100559.12+0.70%Dow 30448.76-0.19%Russell 2000232.05+0.54%ASML921.40+1.24%TSMC214.68+1.15%Costco904.22-0.35%MercadoLibre2,140.50+1.34%Berkshire486.90+0.21%Novo Nordisk88.34-1.58%S&P 500612.44+0.36%Nasdaq 100559.12+0.70%Dow 30448.76-0.19%Russell 2000232.05+0.54%ASML921.40+1.24%TSMC214.68+1.15%Costco904.22-0.35%MercadoLibre2,140.50+1.34%Berkshire486.90+0.21%Novo Nordisk88.34-1.58%

Research

Stock research notes

One company, one thesis, and the specific evidence that would prove us wrong. We publish notes on businesses we would be happy to own for a decade — and we tell you when we are only watching.

FreeOpen to everyoneSubscriberIncluded in the $12/month letter
ASMLAccumulate
Semiconductor equipmentOct 21, 2026Subscriber

ASML Holding

Every leading-edge logic and memory fab on earth has to buy one company's lithography machines. That is a toll booth on compute itself — and the market still prices it like a cyclical.

Conviction Horizon 7–10 yearsPreview →
COSTHold
Consumer staples retailOct 16, 2026Subscriber

Costco Wholesale

Costco's profit is not in the merchandise. It is in the membership renewal rate. That single number explains why the business survives recessions that flatten every other retailer.

Conviction Horizon 10+ yearsPreview →
MELIAccumulate
Emerging market e-commerceOct 9, 2026Subscriber

MercadoLibre

The commerce business pays for the fintech business, and the fintech business makes the commerce business impossible to compete with. Most investors still value one and ignore the other.

Conviction Horizon 5–8 yearsPreview →
TSMAccumulate
Semiconductor foundryOct 2, 2026Free

Taiwan Semiconductor Manufacturing

Free sample research note. Nearly every advanced chip in your life is printed by one company, at a price it increasingly gets to set. Here is how we think about owning it.

Conviction Horizon 7–10 yearsRead →
ABNBWatchlist
Travel platformsSep 25, 2026Subscriber

Airbnb

A near-perfect balance sheet and a brand amateurs cannot buy, wrapped around a growth rate that is converging on the travel industry average. We are waiting, not buying.

Conviction Horizon 3–5 yearsPreview →
BRK.BAccumulate
Diversified holding companySep 18, 2026Subscriber

Berkshire Hathaway

The cheapest quality in the market is still a conglomerate nobody wants to explain at a dinner party. Insurance float plus a cash pile is a call option on other people's panic.

Conviction Horizon 10+ yearsPreview →
CRWDWatchlist
Cybersecurity softwareSep 11, 2026Subscriber

CrowdStrike

Security platforms are sticky in a way that most software is not, because ripping one out means admitting you cannot see your own network. The price is still the problem.

Conviction Horizon 5–8 yearsPreview →
NVOHold
PharmaceuticalsSep 4, 2026Subscriber

Novo Nordisk

The most profitable new drug category in a generation, and a share price that already knows it. We hold what we own and refuse to add until supply and pricing settle.

Conviction Horizon 5–10 yearsPreview →

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